Micrometer.



PATENTED MAY 29, 1906.

L. KREUTZKA'MP.

MIUROMBTER.

APPLICATION FILED SEPT.25, 1905 mnmlm WITNESSES: J M IINVENT0R= Wax v1 m flb 'BY 3 WWW WW ATTORNEY.

UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented may 29, 1906.

Application filed September 25. 1905. sum No. 280.052.

' To all iizhom itma/y concern.-

Be it known that. I, Doors KREirrzKAMP, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Micrometer's; and I do hereby declare the followin to'be a full,

clear, and exact description of t e invention,

such as will enable others skilled in the art to which it appertains to make and use the same, reference, being had to the accompanyin drawings, and to figures of reference mark'e' thereon, which form a part of this specification. p 1

The objects of this invention are to facilitate thesetting of a micrometer-gage to the part to be measured, to secure greater accuracyof measurement and a more cheap construction, and to obtain other advantages and results, some of which may be hereinafter referred to in connection With the description of the working parts. The invention consists in the improved crometer-gage and in the arrangements and 2 5 combinations of parts of the same, all substantially as will be hereinafter set forth, andfinally embraced. in the clauses of the claim. Referrin to the accompanying drawings, in which li e'numerals of reference indicate corresponding parts in each of the several figures, Figure 1 is a plan of the improved ga e.-' Fig. 2 is a section of the same, taken at he 2 2 of Fig. 1; and Fig. 3 is a sectional dletaill showing the relation of the parts more 0 ear I In s aid, drawings, '1 indicates-a'beam provided with V-shapednotches 5 in its outer edge, the distance between the notches being substantially the same as the distance of travel of the micrometer-screw.- 2 is a fixed jaw integral-with said beam and extending aterall at right angles thereto, and 3 is a movab e jaw arranged on said beam'and extending in a'direction parallel with the fixed jaw, the end of said sliding jaw which ,en-

. gages the beam being enlarged, as at '32, to receive the parts hereinafter referred to and to (provide a long bearing against said beam.

n the. projecting 'extremitj'; of the mov able jaw is formed a threaded arrel or'head 31 ada ted to receive the micrometer-screw 'eter-screw, which is screw-threaded in any 4, said' ead or-barrel being perforated in a -usual manner to enter said head and be ad-,

justed therein to the part being measured. The said adjustable jaw 3 is suitably er forated to.neatl 'recelve the beam l an effeet a positive siding therein, and the erforation is enlarged at oneside of the 'aw ody -as at 6 in Fig. 3, to receive a paw 7. Sand pawl 7 is pivotally secured in said recess on the (pin 71 and has a V-shaped free end or hea 11, corresponding with and adapted to enter the V-shaped notch 6 in the beam. ,To hold said V-sha ed free end within the said notch positive y and securely, I have provided a set-screw 9, which'lies in a thread! ed perforation 91 in the movable jaw and engages the side of.the pawl opposite that from which-the V-shaped part 11 projects, aswill To obtain eater rigidity of the movable jaw upon the cam, I prefer to employ a sec- 0nd set-screw 10, which presses upon the spring 8, and thus indirectly upon the beam 1 to prevent any rockin movement and secure the desired increase receiving the pressure of the screw 10 serves to protect the edge of the beam 1 from any injury due to the pressure of the screw 10 thererigidity. The spring on. By the construction thus described the beam land movable jaw' 3 are held in fixed relation with greater rigidity, so thatthe usual micrometer-screw 4 can su sequently be manipulated therein to secure an exact meas urement.

Having thus described the invention, what I I claim as new is--'- 1. The improved. micrometergage herein described, comprising a beam havm a fixedjaw and a movablejaw-slidably "sposed thereon, the said movable 'aw an enlargement innits beam-pe oratlontorecelve a pawl", a pawl pivotally arranged in said per? foration, and a set-screw seated in said movable jaw and engagin the pawl or dog-to 'hold the same, substantia ly'as set forth.

' 2. The improved micrometer-gagehereint described, eomprisin a notched beam having a fixed aw exten in laterally therefrom,

crometer-screw'having its bearings on said r16 'a-movable jaw arrange on saidibeam; a

jaw, a pawl pivoted .on said jaw and adapted to enter a notch of the beam, a set-screw adapted to hold said pawl within said notch,

- and a spring for throwing the pawl out of the notch, substantiall as set forth.

3, The improve micrometer-gage herein described, comprising a notched beam hav- [0 jaw, a pawl pivoted on said jaw and ada second set-screw at a distance from the first to increase therigidity of the parts, and a spring for throwing the pawl out ofthe notch,

snbstantiallyas set forth.

-' 4. The improved micrometerdescribed, comprising a notched earn havage herein ing a fixed jaw extendin laterally therefrom, a movable jaw arrange on, said beam,- a micrometer-screw having its bearings on said jaw, a pawl pivoted on said jaw and adapted to enter a notch of the beam, a set-screw adapted to hold said pawl within said notch, and a spring for throwing the pawl out of the notch, and a second set-screw seated in the movable jaw at a distance from the first and bearing against the spring substantially'as set forth.

Intestimony that I claim the foregoing I have hereunto set my hand this 22dday-of September, 1905.

LOUIS KREUTZKAMZR Witnesses:

CHARLES H. PELL, RUSSELL M. EVERETT. 

